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Marshall Kilburn III – 360° portable flagship, 50h+, IP54
Marshall Kilburn III is Marshall’s flagship portable Bluetooth stereo speaker with True Stereophonic 360° sound, a 1× 4″ woofer + 2× 2″ full-range driver layout, 50+ hours of replaceable-battery playback, Dynamic Loudness, and physical Volume, Bass, and Treble knobs in a guitar-amp-inspired body. At 2.8 kg with a detachable velvet-lined strap, it targets listeners who want retro Marshall styling and marathon runtime beyond Middleton or Emberton.
District M is an authorized Marshall retailer in Vietnam with 12-month warranty and one-for-one replacement on eligible claims. Browse the Marshall speaker collection for portable and Home line models in Black & Brass and Cream.
Quick summary
| Specification | Detail |
|---|---|
| Type | Flagship portable Bluetooth speaker (battery-powered) |
| Sound | Stereo · True Stereophonic 360° · Dynamic Loudness |
| Driver layout | 1× 4″ woofer + 2× 2″ full-range (bass reflex cabinet) |
| Amplification | 1× 30 W + 2× 10 W Class D |
| Frequency range | 45 Hz – 20,000 Hz |
| Max SPL | 91 dB @ 1 m |
| Battery | 50+ hours playback · replaceable Li-ion pack |
| Quick charge | 20 minutes for ~8 hours (30 W PD charger) |
| Full charge | ~3 hours via USB-C (30 W PD) |
| Power bank | USB-C reverse charging for phones and devices |
| Wireless | Bluetooth 5.3 (Auracast supported) · multipoint |
| Wired | 3.5 mm AUX input |
| Durability | IP54 splash and dust resistance |
| Microphone | No built-in mic (playback-focused) |
| Dimensions / weight | 273 × 150 × 169 mm · 2.8 kg |
| Colors | Black & Brass, Cream |
| Materials | 38% recycled content in overall composition |
| App | Marshall Bluetooth app (iOS / Android) |
| Warranty (District M) | 12 months, authorized genuine product |
Why choose Marshall Kilburn III?
- True Stereophonic 360°: multi-directional stereo that fills a room or patio without aiming the grille at one seat.
- 50+ hour replaceable battery: Marshall’s longest portable runtime with a user-replaceable pack.
- Retro amp design: leather-like wrap, metal grille, and detachable guitar-strap carry handle.
- Physical tone controls: dedicated Volume, Bass, and Treble knobs plus an M-button for presets.
- Dynamic Loudness: tonal balance adjusts as volume changes for fuller sound at low levels.
- USB-C power bank: reverse charge your phone from the speaker battery on long trips.
- AUX + Bluetooth multipoint: wired playback and two-device pairing where supported.
Sound: True Stereophonic and bass-reflex stereo
Kilburn III uses a bass-reflex active stereo cabinet with one 4″ woofer and two 2″ full-range drivers, driven by 1× 30 W and 2× 10 W Class D amplifiers. Marshall’s True Stereophonic spreads stereo energy in all directions so listeners around a campfire, picnic table, or living room hear balanced imaging without a single sweet spot.
Frequency response is rated 45 Hz to 20 kHz with up to 91 dB SPL @ 1 m: flagship portable scale for outdoor gatherings. Dynamic Loudness keeps bass and detail coherent when you dial volume down for indoors or up for open air. Codecs include SBC, AAC, and LC3 over Bluetooth 5.3 with Auracast support.
Battery, design, and daily use
50+ hours of wireless playback per charge supports week-long camping or festival use without daily plugging. A 20-minute quick charge on a 30 W PD adapter returns about 8 hours of listening; full recharge takes roughly 3 hours. The replaceable Li-ion battery helps extend product life beyond fixed-cell portables.
The body combines a premium leather-like wrap, vintage metal grille, and a detachable velvet-lined strap modeled on guitar straps. Finish options are Black & Brass and Cream. IP54 protects against dust and splashing water for outdoor patios and travel, though it is not rated for full submersion like IP67 Middleton or Emberton.
Connectivity and controls
Bluetooth 5.3 pairs with phones and tablets; Bluetooth multipoint supports two sources where enabled. Marshall lists Bluetooth range at up to 10 m in typical use. A 3.5 mm AUX jack adds wired playback from turntables, laptops, or older sources.
The top panel mirrors a Marshall amp: Volume, Bass, and Treble knobs, a media jog control, power, Bluetooth pairing, and an M-button for quick preset access. USB-C accepts 5 V / 3 A or 9 V / 3 A input and can reverse charge your phone. There is no built-in microphone: Kilburn III is tuned for music playback, not speakerphone duty.
The Marshall Bluetooth app offers EQ presets, remote control, and firmware updates.
Kilburn III vs Middleton II vs Emberton III
| Model | Kilburn III | Middleton II | Emberton III |
|---|---|---|---|
| Tier | Flagship portable | Mid-size portable | Compact portable brick |
| Drivers | 4″ woofer + 2× 2″ full-range | 2 woofer + 2 tweeter | 1 full-range + passive radiators |
| Max SPL | 91 dB @ 1 m | 91 dB @ 1 m | Lower scale (compact) |
| Battery | 50+ hours, replaceable | 30+ hours, replaceable | 32+ hours |
| IP rating | IP54 (splash/dust) | IP67 (submersible) | IP67 |
| Weight | 2.8 kg | 1.8 kg | 0.67 kg |
| Microphone | No | Yes | Yes |
| Power bank | Yes (USB-C out) | Yes | No |
| Best for | Retro flagship portable, marathon battery, room-filling 360° | Rugged IP67 groups, bass/treble + mic | Light travel stereo brick |
Step down to Marshall Middleton II when you need IP67 submersion rating, built-in mic, and less carry weight. Choose Marshall Emberton III for the lightest stereo brick. Kilburn III is the pick when 50+ hour runtime and amp-style presence matter most.
Who is Kilburn III for?
- Listeners who want Marshall’s most capable portable with retro guitar-amp aesthetics
- Camping, road trips, and patio sessions that need 50+ hours without recharging
- Buyers who prefer physical bass/treble knobs and Dynamic Loudness over app-only tuning
- Collectors upgrading from Kilburn II for longer battery and refreshed True Stereophonic tuning
Not ideal if you need IP67 pool submersion, built-in speakerphone mic, or the smallest carry weight: compare Middleton II or Emberton III. For mains-powered home rooms, see a Home line speaker in FAQ.
Technical specifications
| Category | Value |
|---|---|
| Driver type | Dynamic |
| Driver configuration | 1× 4″ woofer + 2× 2″ full-range |
| Amplification | 1× 30 W Class D (woofer) + 2× 10 W Class D (full-range) |
| Frequency range | 45 Hz – 20,000 Hz |
| Sound type | Stereo, 360° True Stereophonic |
| Max SPL | 91 dB @ 1 m |
| Enclosure | Bass reflex, active stereo loudspeaker |
| Bluetooth | 5.3, Auracast supported, multipoint · up to 10 m |
| Codecs | SBC, AAC (MPEG-2), LC3 |
| Wired input | 3.5 mm AUX |
| Controls | Volume, Bass, Treble, On/Off, Media jog, M-button, Bluetooth |
| Microphone | None |
| Battery playback | 50+ hours (replaceable Li-ion) |
| Quick charge | 20 min ≈ 8 hours (30 W PD) |
| Full charge time | ~3 hours via USB-C 5 V / 3 A or 9 V / 3 A (30 W PD) |
| IP rating | IP54 |
| Dimensions | 273 × 150 × 169 mm (10.74 × 5.9 × 6.65 in) |
| Weight | 2.8 kg (6.17 lb) |
| Colors | Black & Brass, Cream |
| In the box | Kilburn III speaker, USB-C to USB-C cable, quick start guide, legal and safety information |
Source: Marshall Kilburn III official specifications.
Frequently asked questions
What is Marshall Kilburn III?
Marshall Kilburn III is Marshall’s flagship portable stereo speaker with True Stereophonic 360° sound, 50+ hour replaceable battery, Dynamic Loudness, and guitar-amp-style physical controls.
How long does Kilburn III battery last?
Marshall rates 50+ hours of playback per charge. Quick charge: 20 minutes for about 8 hours with a 30 W PD adapter. Full recharge in roughly 3 hours. The battery is user-replaceable.
Is Marshall Kilburn III waterproof?
IP54: protected against dust and splashing water, suitable for outdoor patios and travel. It is not IP67 submersible. For pool or beach immersion rating, compare Marshall Middleton II.
Does Kilburn III have a built-in microphone?
No. Kilburn III has no built-in mic and is designed for music playback, not hands-free calling.
Can Kilburn III charge my phone?
Yes. The USB-C port supports reverse charging so you can top up your phone from the speaker battery.
Kilburn III vs Middleton II: which should I choose?
Kilburn III: 50+ hour battery, retro amp design, 2.8 kg, IP54, no mic. Middleton II: lighter 1.8 kg, IP67, built-in mic, four-driver layout. Pick Kilburn for marathon runtime and flagship styling; Middleton for rugged IP67 and speakerphone use.
Where to buy authentic Marshall Kilburn III in Vietnam?
District M is an authorized Marshall retailer with 12-month warranty. Contact District M for Black & Brass or Cream stock. For home listening, see Marshall Acton III.
Conclusion
Marshall Kilburn III is Marshall’s portable flagship: True Stereophonic 360° stereo, 50+ hour replaceable battery, Dynamic Loudness, USB-C power bank, and amp-inspired controls in a 2.8 kg retro body. It fits listeners who outgrow Middleton but still want wireless freedom with marathon runtime and unmistakable Marshall character.
Marshall Kilburn III at District M
Authorized Marshall retailer in Vietnam. Compare Kilburn III with Middleton II and Emberton III, or ask about color availability.
